Lieutenant Colonel John H. Glenn Selected for Space Training
April 10, 1959 in Marine Corps History.
Posted on 4/10/2026
On April 10, 1959, Lieutenant Colonel John H. Glenn, Jr. was named as one of the original seven Project Mercury astronauts selected for space training. All seven astronauts were volunteers and were selected by NASA out of a pool of 110 candidates, all of whom were leading military test pilots. Just under three years later, in February of 1962, Glenn became the first American to orbit the Earth.
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